Is there any other medical condition like
diabetes etc ?
Please add any other symptoms you have.
Did your dentist advised any cleaning of teeth etc and if your dentist prescribed any medicated mouthwash etc ?
Have you started any new diet which consists more of proteins and less in carbohydrates? This is sometimes the cause of bad breath due to a process called Ketosis.
Please add these details.
Next Steps
Visit your nearby dentist for second opinion with the help of proper oral checkup.
Health Tips
Please rinse your mouth after every meal or snacking. Brush your teeth twice daily along with flossing.